Chair.



L. H. CLARK.

CHAIR.

APPLICATION FILED JULY 28,1914.

Patented Apr, 4, 1916.

ENVENTOR WITNESSES ATTORN EY LEON H. CLARK, OF PRIMOS, PENNSYLVANIA.

CHAIR.

` Specification of Letters Patent.

Patented Apr. 4, 1916.

Application 1e'd July 28, 1914. Serial No. 853,577.

T0 all whom it may concern VBe it known that I, LnoN H. CLARK, a citizen of the United States, and a resident of Primos, Delaware county, State of Pennsylvania, have invented certain new and useful Improvements in Chairs, of which the following is a specification.

My invention relates to improvements in chairs and has for its object to provide an improved construction of means whereby the seat of a chair may be adjusted to and supported at different heights and at different angles.

In the accompanying drawings I have illustrated one form of a preferred construction embodying my invention, but it will be understood that various changes in details of construction may be made within the scope of the claims without departing from my invention.

In the drawings Figure 1 is a vertical longitudinal central section taken from front to rear 0f a chair embodying my invention; Fig. 2 is a front elevation of the same; Fig. 3 is a view similar to Fig. 1 showing a portion only of the chair and showing the seat in a different position from that shown in Fig. 1; Fig. 4 is a view taken on the line 4-4 of Fig. 3; Fig. 5 is a longitudinal sectional view of a portion of the chair showing a detail of construction, a portion of the seat being showny in plan; and Fig. 6 is an elevational view of a portion of the means at the rear of the chair for supporting the rear part of the seat in different positions as to height.

fteferrino. to the drawings, 1 and 2 repre# sent the front and rear legs respectively of the chair, which are braced and bound and held together by means of the cross braces 3 and 4. The rear legs 2 are extended upwardly above the region of the seat and are provided with cross members 5 which are connected by upright members 6 which, taken with the upright extensions of `the rear legs, constitute the back of the chair. The front and rear legs are also secured together in line with the upper portions of the front legs by means of the front and rear bars 7 and the side bars 8. These bars are more firmly secured together by means of triangular blocks 10 which are seated respectively in the angles between the said bars and secured thereto as indicated in Fig. 4 in known manner.

12 designates the seat of the chair. At its rear end or edge the seat is provided with laterally extending lugs 13 which project into slots 14 formed in supporting plates 15 secured to the back or the like immediately above the rear bar or cross piece 7. Each of these plates is provided with downwardly extending notches 17 formed in the edge of the slot 14 as most clearly shown in Figs. 1, 3 and 6 of the drawings. It will be understood that the rear end of the seat may be lifted so as to insert the lugs 13 into any one of the notches 17 as may be desired. When the seat is in its lowermost position the oppositely extending lugs 13 rest at the lower end of the slot 14 in a notch 18. In order that the front end of the seat may be supported at diEerent heights corresponding to the heights of the several notches 17, I have provided the members 20, 21 and 22, the central portions of which are straight and extend transversely of the chair as indicated in Fig. 4 of the drawings. The opposite ends of these members 20, 21 and 22 are bent substantially at right angles as shown, and are pivotally connected to pivots 23 supported in lugs or projections 24 extending upwardly from the triangular members 10 which are situated at the front of the chair.

.The straight portions of the members 20, 21 and 22 are provided with short projecting lugs 25 which are adapted to project into shallow holes 26 formed in the bottom of the chair seat in position to register with the said lugs so that when any one of the members 20, 21 or 22 is turned about its pivot into the upright position indicated in Fig. 3 of the drawings these lugs 25 project into the holes in the bottom of the seat and not only serve to prevent movement of the seat laterally of the chair but also to prevent the member 20, 21 or 22, as the case may be, from accidentally turning or moving down into horizontal position and therebyy permitting the front part of the chair seat to be lowered. The seat and any one of said members 20, 21 or 22 are in that way so engaged and bound together that a rigid and desirable construction is obtained.

It will be observed, upon reference to Fig. 3, that the seat is slightly inclined from the rear toward the front. It will be understood that the heights of the notches 17 with respect to the supports at the front of the chair may be so related to each other that the chair seat may be supported in exactly a horizontal position. It will also be understood that if it is desired that the seat oceupy a more inclined position than that shown, the intermediate member 21'or even the lowest member 20 may be moved to a vertical position. In this case if the rear part of the seat is supported in the position shown in Fig. 3 while the front part is supported upon the intermediate support 2l or the still lower support 20, it will be clear that the inclination downwardly from the rear toward the front will be greatly increased. It will be seen, therefore, that I have provided a means whereby the seat may not only be raised and lowered to different heights but a means whereby the amount of inclination of the seat downwardly from the rear toward the front, or for that matter from the front toward the rear, may be varied by increasing or diminishing such inclination.

I claim l. In a chair, the combination of a chair seat having laterally projecting lugs situated adjacent to the rear ends of the opposite sides thereof, notches upon the opposite sides ofl the back of the chair for receiving said lugs whereby the rear part of said seat may be supported at different heights, and a plu rality of yoke-shaped devices pivotally secured to the front part of the chair structure and adapted to be moved separately and independently into position to vsupport the front of said chair seat at different heights as may be desired, substantially as described.

2. In a chair, the combination of` a seat having lugs projecting laterally from its side edges at its rear end and also having holes formed in the under side thereof, members ofy different heights pivotally connected to the frame structure at the front of the chair which members respectivelyare adapted to be moved into position to support'the front of the said seat in elevated position, and said membersbeing provided with projections which are adapted to enter the holes in the under side of the seat when the members are in such position, and slotted plates secured to the inner sides of the opposite side members of the back of the chair, said plates being provided with notches one above the other and opening from the said slot, which notches are adapted respectively to receive and support the lugs extending laterally from the said seat.

In testimony that Iclailn the foregoing as if my invention I have hereunto si ed `my name this 25th day of July, A. Dg 1914. f LEON H. CLARK.

In thepresence 0f- Y HORACE D. REEVE, CYRUs V. ANDERSON;

Copies of` this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. A 

